Best M12 Flat Washers in 2026
Daisy
Last Updated: Jul 17, 2026
Daisy
Last Updated: Jul 17, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| LUPANTER HARDWARE STORE | 9.77 | ✅ | ✅ | ✅ |
【Size】--inner diameter 0.464-0.484inch, outside diameter 0.915-0.937 inch, thickness 0.051-0.080
【Made of Stainless】 --- Completely and infinitely recyclable, stainless steel is the “green material” par excellence. good corrosion resistance, extremely hygienic, easy to maintain, highly durable and offers a wide variety of aspects.
【Widely Applications】 --- Also known as plain washers, their purpose is to distribute the fastener's load while reducing heat and friction during the tightening process. These general use flat washers are positioned under the head of a bolt or nut in order to provide a smooth bearing surface and distribute the fastener load over a wider area.
【USA Standard】 ---The size and performance according to the American standard ANSI/ASME B18.22.1(SAE)., suitable for the SAE size screw and nuts.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| LUPANTER HARDWARE STORE | 9.77 | ✅ | ✅ | ✅ |
【Size】--inner diameter 0.276-0.296 inch, outside diameter 0.620-0.640 inch, thickness 0.051-0.080
【Made of Stainless】 --- Completely and infinitely recyclable, stainless steel is the “green material” par excellence. good corrosion resistance, extremely hygienic, easy to maintain, highly durable and offers a wide variety of aspects.
【Widely Applications】 --- Also known as plain washers, their purpose is to distribute the fastener's load while reducing heat and friction during the tightening process. These general use flat washers are positioned under the head of a bolt or nut in order to provide a smooth bearing surface and distribute the fastener load over a wider area.
【Reasonable Package】 --- Each type of the washer been packaged individually by small poly bag .You can easily take any type you want.
【USA Standard】 ---The size and performance according to the American standard ANSI/ASME B18.22.1(SAE)., suitable for the SAE size screw and nuts.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DGOL | 9.88 | ✅ | ✅ | ✅ |
MATERIAL: MADE OF 304 STAINLESS STEEL, SMOOTH, NICE AND STRONG, NO RUST
QUANTITY: 200PCS #10 SAE 304 STAINLESS STEEL FLAT WASHERS IN ONE PACKAGE
SIZE: INNER DIAMETER IS: 0.22" (5.68mm), OUTER DIAMETER IS: 1/2" (12.75mm), THICKNESS IS : 0.044" (1.12mm) THESE ARE SAE FLAT WASHERS
IDEAL FOR USE AT HOME, OUTSIDE, INDUSTRY PROJECT. GOOD REPLACEMENT WASHERS
WE HAVE DIFFERENT SIZES SAE FLAT WASHER: #8, #10, 1/4", 3/8", 1/2", 5/8", 3/4", 1". AND WE ALSO HAVE 3 SIZES USS FLAT WASHER: 1/4", 3/8", 1/2". YOU COULD FIND THESE WASHERS IN OUR AMAZON STORE "DGOL"
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DGOL | 9.88 | ✅ | ✅ | ✅ |
MATERIAL: MADE OF 304 STAINLESS STEEL, SMOOTH, NICE AND STRONG, NO RUST
QUANTITY: 200PCS #8 SAE 304 STAINLESS STEEL FLAT WASHERS IN ONE PACKAGE
SIZE: INNER DIAMETER IS: 0.193" (4.9mm), OUTER DIAMETER IS: 7/16" (11.22mm), THICKNESS IS : 0.044" (0.99mm) THESE ARE SAE FLAT WASHERS
IDEAL FOR USE AT HOME, OUTSIDE, INDUSTRY PROJECT. GOOD REPLACEMENT WASHERS
WE HAVE DIFFERENT SIZES SAE FLAT WASHER: #8, #10, 1/4", 3/8", 1/2", 5/8", 3/4", 1". AND WE ALSO HAVE 3 SIZES USS FLAT WASHER: 1/4", 3/8", 1/2". YOU COULD FIND THESE WASHERS IN OUR AMAZON STORE "DGOL"
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| AUYI | 6.82 | ❌ | ❌ | ❌ |
🏡212cc OHV engine, horizontal pump, 3500 PSI max pressure, 2.6 gallons per minute. Designed to eliminate stubborn stains.
🏡 50 FT hose, threaded M22 pump/hose connection, 13'' premium wheels, easy move and store.
🏡 5 quick connect nozzle tips: 0°, 15°, 25°, 45° and soap. Perfect for cleaning cars, yards, garages, walls, trucks and roofs.
🏡 13" big tires: We use very good quality pneumatic rubber tires, so you can easily move the washing machine in the garden, making it flat. There are obvious tooth grooves on the outside of the tire. You can rest assured that it will not wear out completely after 2 years of use.
🏡【Tips for you】🍀M22 pressure hose, SAE 10W-30 oil, fuel less than 10% ethanol .🍀All pressure washers are 100% functionally tested at the factory and may contain minimal residual fuel/oil or fuel smell. 🍀Please check for sufficient oil (0.2 gallon) every time you use it to ensure the washing machine runs efficiently.🍀This item is non-returnable, if the item arrives damaged or defective, please contact the after-sales address, you can ask for a partial refund or replacement parts.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| BC Precision | 9.93 | ✅ | ✅ | ✅ |
Package of 100 premium washers
Inside Diameter 5/16"
Outside Diameter 3/4"
Thickness 1/32"
304 stainless steel for corrosion resistance
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| BC Precision | 9.93 | ✅ | ✅ | ✅ |
Package of 100 premium washers
Inside Diameter 7/32"
Outside Diameter 1/2"
Thickness .056"
Zinc plated for corrosion resistance
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| BC Precision | 9.93 | ✅ | ✅ | ✅ |
Package of 100 premium washers
Inside Diameter 5/32"
Outside Diameter 3/8"
Thickness .042"
Zinc plated for corrosion resistance
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| BoltsandNuts com | 9.89 | ✅ | ✅ | ✅ |
731 Pieces - High Quality Grade 8 SAE X-Thick / Thick Fender Washer Assortment!
Flat Washers: Extra Thick SAE Pattern Grade 8 Zinc Yellow
Fender Washers: 1/8" Thick Low Carbon Steel Zinc Clear
Heavy Duty Locking Steel 24 Hole Compartment Tray (Dim: 13-3/8" Width x 2" Height x 9-1/4" Depth)
See photos for sizes included.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Diameter 1: 5/16 inches
Diameter 2: 11/16 inches
Material: Steel
Finish: Zinc
Thread size: sae
Diameter: 5/16"
Material: Steel
Finish: Zinc
Thread Size: SAE
Hardness: Grade 2 / A307
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Zinc coating for a corrosion resistant finish
SAE fine washers for coarse threaded bolts
Washers are used to increase the pressure a bolt or screw provides
Use a washer that is the same finish as your other fasteners
For use with a 3/8" bolt or screw
50 washers per retail package
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Bcp Fasteners | 3 |
| Dgol | 2 |
| Lupanter | 2 |
| Blubery | 1 |
| Boltsandnuts.com | 1 |
| Hard-To-Find Fastener | 1 |
| The Hillman Group | 1 |
We've carried out a comprehensive analysis of 1,346 reviews on flat washers, using our selection criteria to identify the best options in the fasteners. Our findings reveal that most customers typically select flat washers priced around $56.59, with top brands including wensilon, ylyl, hardlad, lupanter, kindroufly and marine bolt supply and small parts
Our team of expert editors reviewed these high-quality items and handpicked the top 11 flat washers for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the fasteners category. These include wensilong, ylyl direct, faiq ahmed, lupanter hardware store, kindroufly and marine bolt supply and amazon.com .
We are dedicated to assisting our users in finding the right washers Products based on their needs, saving them considerable time when choosing which flat washers to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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